Java

Create a CAdES-T Signature

See more CAdES Examples

Demonstrates how to create a signature with an external timestamp that certifies the time of signing. This requires an online TSA (Time Stamping Authority) service that is capable of producing RFC 3161 compliant timestamps.

Note: This example requires Chilkat v9.5.0.78 or greater.

Chilkat2 Java

import com.chilkatsoft.chilkat2.Cert;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Crypt2;
import com.chilkatsoft.chilkat2.JsonObject;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Crypt2 crypt = new Crypt2();

        // This example will use a certificate + private key from a .pfx/.p12 file.
        // On Windows systems, it is also possible to use certs on smartcards/usb tokens or certs pre-installed in the Windows registry.
        Cert cert = new Cert();

        String pfxPath = "qa_data/pfx/myCertAndKey.p12";
        String pfxPassword = "test123";

        try {
            cert.loadPfxFile(pfxPath, pfxPassword);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        crypt.setSigningCert(cert);

        // Use SHA-256 rather than the default of SHA-1
        crypt.setHashAlgorithm("sha256");

        // Create JSON that tells Chilkat what signing attributes to include:
        JsonObject attrs = new JsonObject();
        attrs.updateBool("contentType", true);
        attrs.updateBool("signingTime", true);
        attrs.updateBool("messageDigest", true);
        attrs.updateBool("signingCertificateV2", true);

        // A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
        // We must include the TSA's URL, as well as a few options to indicate what is desired.
        // Except for the TSA URL, the options shown here are typically what you would need.
        attrs.updateBool("timestampToken.enabled", true);
        attrs.updateString("timestampToken.tsaUrl", "https://freetsa.org/tsr");
        attrs.updateBool("timestampToken.addNonce", false);
        attrs.updateBool("timestampToken.requestTsaCert", true);
        attrs.updateString("timestampToken.hashAlg", "sha256");

        crypt.setSigningAttributes(attrs.emit());

        String inFile = "qa_data/json/sample.json";
        String outFile = "qa_output/sample_cades_t.p7m";

        // This creates the CAdES-T signature.  During the signature creation, it
        // communicates with the TSA to get a timestampToken.
        try {
            crypt.createP7M(inFile, outFile);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Success.");
    }
}